Update/remove tests from legacy

Since this will be a breaking release, it should be OK to remove
or update tests.

test/legacy.jl

@@ -184,7 +184,7 @@
  A[4,4,2] = 0.6
  Ae = erode(A)
  @test Ae == zeros(size(A))
- Ad = dilate(A, 1:2)
+ Ad = dilate(A; dims=1:2)
  Ar = [0.8 0.8 0.8 0;
  0.8 0.8 0.8 0;
  0.8 0.8 0.8 0;
@@ -194,7 +194,7 @@
  0 0 0.6 0.6;
  0 0 0.6 0.6]
  @test Ad == cat(Ar, Ag, zeros(4,4), dims=3)
- Ae = erode(Ad, 1:2)
+ Ae = erode(Ad; dims=1:2)
  Ar = [0.8 0.8 0 0;
  0.8 0.8 0 0;
  0 0 0 0;
@@ -208,9 +208,9 @@
  @test dilate(trues(3)) == trues(3)
  # ImageMeta
  @test arraydata(dilate(ImageMeta(A))) == dilate(A)
- @test arraydata(dilate(ImageMeta(A), 1:2)) == dilate(A, 1:2)
+ @test arraydata(dilate(ImageMeta(A); dims=1:2)) == dilate(A; dims=1:2)
  @test arraydata(erode(ImageMeta(A))) == erode(A)
- @test arraydata(erode(ImageMeta(A), 1:2)) == erode(A, 1:2)
+ @test arraydata(erode(ImageMeta(A); dims=1:2)) == erode(A; dims=1:2)
  end
 
  @testset "Opening / closing" begin
@@ -277,10 +277,7 @@
  true false true true]
  lbltarget = [1 1 0 2;
  1 0 2 2]
- lbltarget1 = [1 2 0 4;
- 1 0 3 4]
  @test label_components(A) == lbltarget
- @test label_components(A, [1]) == lbltarget1
  connectivity = [false true false;
  true false true;
  false true false]
@@ -289,11 +286,6 @@
  lbltarget2 = [1 1 0 1;
  1 0 1 1]
  @test label_components(A, connectivity) == lbltarget2
- @test component_boxes(lbltarget) == Vector{Tuple}[[(1,2),(2,3)],[(1,1),(2,2)],[(1,3),(2,4)]]
- @test component_lengths(lbltarget) == [2,3,3]
- @test component_indices(lbltarget) == Array{Int64}[[4,5],[1,2,3],[6,7,8]]
- @test component_subscripts(lbltarget) == Array{Tuple}[[(2,2),(1,3)],[(1,1),(2,1),(1,2)],[(2,3),(1,4),(2,4)]]
- @test @inferred(component_centroids(lbltarget)) == Tuple[(1.5,2.5),(4/3,4/3),(5/3,11/3)]
  end
 
 end